岩石变形特征和声发射特征的三轴试验研究
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摘要
通过常规三轴压缩试验研究了花岗岩破坏全过程的变形特征和声发射特征,分析了围压对岩石变形特征和声发射特征的影响,结果表明岩石声发射特征与变形特征紧密相关。因此,可以利用岩石声发射现象缓慢增加阶段作为判断岩石弹性变形阶段,从而确定岩石的弹性极限,利用岩石声发射现象急剧增加阶段的起点判断岩石的破坏前兆。
The deformation and acoustic emission properties of granite during failure process were researched through triaxial compression experiment.The effect of confining pressure on deformation property and acoustic emission property of granite was analyzed.The results showed that there was a better consistency between deformation property and acoustic emission property of granite.So,the slowly increasing phase of acoustic emission could be used to estimate the elastic phase and the elastic limit strength of rock,the beginning of rapid increasing phase of acoustic emission could be used as an index of rock failure.
The deformation and acoustic emission properties of granite during failure process were researched through triaxial compression experiment.The effect of confining pressure on deformation property and acoustic emission property of granite was analyzed.The results showed that there was a better consistency between deformation property and acoustic emission property of granite.So,the slowly increasing phase of acoustic emission could be used to estimate the elastic phase and the elastic limit strength of rock,the beginning of rapid increasing phase of acoustic emission could be used as an index of rock failure.
引文
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[2]彭新明,孙友宏,李安宁.岩石声发射技术的应用现状[J].世界地质,2000,19(3):303-306.
[3]李庶林,尹贤刚,王泳嘉,等.单轴受压破坏全过程声发射特征研究高地应力与岩爆有关问题的研究现状[J].岩石力学与工程学报,2004,23(15):2499-2503.
[4]潘长良,祝方才,曹平,等.单轴压力下岩爆倾向岩石的声发射特征[J].中南工业大学学报,2001,32(4):336-338.
[5]Lei Xinglin,Koji Masuda,Osamu Nishizawa,et al.Detailed Analysis of Acoustic Emission Activity During Catastrophic Frac-ture of Faults in Rock[J].Journal of Structural Geology,2004,26:247-258.
[6]谢强,张永兴,余贤斌.石灰岩在单轴压缩条件下的声发射特性[J].重庆建筑大学学报,2002,24(1):19-23.
[7]尹贤刚,李庶林,唐海燕,等.岩石破坏过程中的声发射特征研究[J].矿业研究与开发,2003,23(3):9-11.
[8]孙吉主,周健,唐春安.影响岩石声发射的几个因素[J].地壳变形与地震,1997,17(2):1-5.
[9]李俊平,周创兵.岩体的声发射特征试验研究[J].岩土力学,2004,25(3):374-378.
[10]付小敏.典型岩石单轴压缩变形及声发射特征试验研究[J].成都理工大学学报(自然科学版),2005,31(1):17-21.
[11]徐东强,单晓云,张艳博.用岩石声发射与岩石损伤分析岩爆发生机制[J].有色金属(矿山部分),2000,16(3):28-30.
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